The bootstrap-wysihtml5-rails gem includes the vendored JavaScript library 'handlebars.js'. Versions 0.3.3.7-0.3.3.8 include handlebars 3.0.2, and versions 0.3.3.5-0.3.3.6 include handlebars 1.3.0.

Versions Affected: 0.3.3.5-0.3.3.8 Not affected: < 0.3.3.5 Fixed Versions: None

Versions of handlebars prior to 3.0.8 or 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Objects' proto and defineGetter properties, which may allow an attacker to execute arbitrary code through crafted payloads.